EUROBLOC
SERVICE MANUAL FOR HOIST
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may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of Verlinde S.A.S.
Copyright © (2013) Verlinde S.A.S. All rights reserved.
06/2015
7.1.13.5 Hook operated control limit switch, Frame size: VT3, VT4, VT5 (new model)
The hook operated limit switch trips hoisting movement when the hook reaches the adjustable limit switch slide.
The hook operated limit switch can be reset automatically or manually. With automatic reset, the hoisting
movement is possible again after tripping as soon as the hook has been lowered from the switching area. The hook
operated limit switch with automatic reset can be used as a working limit before the tripping height of the standard
upper limit.
With manual reset, the hoisting movement is not possible before the limit switch has been manually reactivated. In
reset situation, the switch reset (see the enlarged illustration window as follows) goes up, and the limit switch is
reactivated by returning the switch reset back to its original position. The hook operated limit switch with manual
reset can be used as a backup switch for the standard upper limit switch. When the manual reset limit switch is
used as a backup switch and the switch stops the hoisting movement, the function of rotating limit switch has to be
checked and corrected before using the hoist again.
The hook operated limit switch increases the hook approach (the hook-rail distance).
Lubricate the roller bearings in the slide plate when necessary to ensure the smooth operation of the limit switch
7.2
Rope reeving system
A trolley with a hoist that has four or more rope falls is equipped with a rope sheave beam including one or more
return sheaves.
The reeving depends on the type of hoist, the amount of rope on the drum and the amount of rope falls. The
reeving scheme is shown in the picture.
7.2.1 Standard reevings (one rope from drum)
Note: a one-rope reeving has a tendency to rotate.